Thirteen people in Sweden have been infected by Hepatitis A virus linked to frozen strawberries from Poland.

Eleven confirmed and two suspected cases come are reported from four Swedish counties, Skåne, Blekinge, Kalmar and Gävleborg.

Nine women and four men aged 11 to 92 are affected. The most recent person to fall ill had symptoms begin on June 18.

The Public Health Agency of Sweden (Folkhälsomyndigheten), the National Food Agency (Livsmedelsverket) and local authorities are involved in the investigation. They traced the source of Hepatitis A virus (HAV) infection to frozen strawberries from Poland and informed Polish authorities of their findings.

All of the cases had smoothies or a dessert containing frozen imported strawberries that were not heated prior to consumption. The strawberries were not sold directly to consumers.